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Cheap flights from London Gatwick Airport to Washington, D.C. from $544

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 7/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from London Gatwick Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
11:20 pm - 11:45 am
IAD
-
LGW
31h 25m
1 stop
$548Icelandair
Thu, May 21 - Sun, May 24
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
11:20 pm - 11:45 am
IAD
-
LGW
31h 25m
1 stop
$549Icelandair
Thu, May 21 - Sun, May 24
SWISS Logo
6:35 pm - 3:15 pm
LGW
-
IAD
25h 40m
1 stop
SWISS Logo
10:25 pm - 5:50 pm
IAD
-
LGW
14h 25m
2 stops
$557SWISS
Tue, Apr 28 - Tue, May 5
Icelandair Logo
1:00 pm - 7:20 pm
LGW
-
IAD
11h 20m
1 stop
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
$558Icelandair
Thu, May 7 - Tue, May 19
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$560Icelandair
Wed, Jun 24 - Sun, Jun 28
Multiple Airlines Logo
8:50 am - 7:20 pm
LGW
-
IAD
15h 30m
2 stops
Multiple Airlines Logo
8:30 pm - 5:55 pm
IAD
-
LGW
16h 25m
2 stops
$580Multiple Airlines
Wed, Apr 29 - Mon, May 4
Multiple Airlines Logo
8:40 am - 7:20 pm
LGW
-
IAD
15h 40m
2 stops
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
LGW
19h 10m
2 stops
$584Multiple Airlines
Thu, Apr 30 - Wed, May 6
SWISS Logo
9:25 am - 4:45 pm
LGW
-
IAD
12h 20m
1 stop
SWISS Logo
8:20 pm - 5:50 pm
IAD
-
LGW
16h 30m
1 stop
$588SWISS
Mon, Apr 20 - Fri, Apr 24
SWISS Logo
9:25 am - 4:45 pm
LGW
-
IAD
12h 20m
1 stop
SWISS Logo
8:20 pm - 5:50 pm
IAD
-
LGW
16h 30m
1 stop
$595SWISS
Mon, Apr 27 - Sun, May 3
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
$604Icelandair
Fri, May 8 - Sat, May 23

TAP AIR PORTUGAL flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
May 12
LGW4:25 pmLondon Gatwick
27h 45m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Aug 3
IAD10:35 pmWashington, D.C. Dulles Intl
30h 10m
1 stop
LGW9:45 amLondon Gatwick
$677
TAP AIR PORTUGAL
Apr 13
LGW9:15 pmLondon Gatwick
22h 55m
2 stops
IAD3:10 pmWashington, D.C. Dulles Intl
Apr 20
IAD10:35 pmWashington, D.C. Dulles Intl
30h 10m
1 stop
LGW9:45 amLondon Gatwick
$698
TAP AIR PORTUGAL
Apr 13
LGW9:15 pmLondon Gatwick
22h 55m
2 stops
IAD3:10 pmWashington, D.C. Dulles Intl
Apr 20
IAD10:35 pmWashington, D.C. Dulles Intl
30h 10m
1 stop
LGW9:45 amLondon Gatwick
$702

Icelandair flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best Icelandair deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
Icelandair
May 21
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
May 24
IAD11:20 pmWashington, D.C. Dulles Intl
31h 25m
1 stop
LGW11:45 amLondon Gatwick
$548
Icelandair
May 21
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
May 24
IAD11:20 pmWashington, D.C. Dulles Intl
31h 25m
1 stop
LGW11:45 amLondon Gatwick
$549
Icelandair
May 7
LGW1:00 pmLondon Gatwick
11h 20m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
May 19
IAD8:30 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
LGW2:40 pmLondon Gatwick
$558

momondo Fare Finder

 
Customize your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 1, 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 5/21

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 5/24

11:20 pm-11:45 am

1 stop31h 25m

$548

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 5/21

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 5/24

11:20 pm-11:45 am

1 stop31h 25m

$549

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 4/28

6:35 pm-3:15 pm

1 stop25h 40m

Washington, D.C. Dulles Intl

Tue 5/5

10:25 pm-5:50 pm

2 stops14h 25m

$557

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 5/7

1:00 pm-7:20 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Tue 5/19

8:30 pm-2:40 pm

1 stop13h 10m

$558

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 6/24

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sun 6/28

11:20 pm-2:40 pm

1 stop10h 20m

$560

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 4/29

8:50 am-7:20 pm

2 stops15h 30m

Washington, D.C. Dulles Intl

Mon 5/4

8:30 pm-5:55 pm

2 stops16h 25m

$580

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 4/30

8:40 am-7:20 pm

2 stops15h 40m

Washington, D.C. Dulles Intl

Wed 5/6

8:30 pm-8:40 pm

2 stops19h 10m

$584

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 4/20

9:25 am-4:45 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Fri 4/24

8:20 pm-5:50 pm

1 stop16h 30m

$588

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 4/27

9:25 am-4:45 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Sun 5/3

8:20 pm-5:50 pm

1 stop16h 30m

$595
Quickest round-trip

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 5/8

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 5/23

8:30 pm-11:45 am

1 stop10h 15m

$604

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $749. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. Dulles Intl Airport for around $869.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $808 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $837 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Gatwick Airport to Washington, D.C. Dulles Intl Airport (LGW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Fastest flight time

10h 55m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 10h 55m
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
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Frequently asked questions about flying from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. A reasonable flight in good conditions will take 10h 55m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Laurel
Colonial Beach
Gaithersburg
Towson
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Sterling
Linthicum Heights
Springfield
Bethesda

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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